@Vivaci [quote]build some muscles and stamina[/quote]
Please check out Sandor's [i]On Piano Playing[/i]...the notion that you need huge strength and stamina...I think this is very much a hallmark of piano teachers pushing technique which doesn't work with your anatomy.
@jennypenny [quote]A bit like saying if Einstein could discover relativity we all could do it @Vivaci [/quote]
Hmmm...you aren't being asked to come up with Chopin's pieces on your own, to compose them.
It is more like saying that, if Einstein could conceive of something, you can understand it, too. Which is true, though it might take you longer, but you have advantages Einstein did not have: over 100 years of people thinking about, writing about, and teaching relativity (special for over 110 yrs, general for over 100 yrs), with the result that it is much easier to learn than going off and reading his [i]Annalen der Physik[/i] papers without guidance.
Likewise, there are many vids etc. about the playing of Chopin, etc., and even vids which might answer "how does pianist X finger this section of Op. Y?"...huge assets formerly unavailable.
You can play Chopin, with time and effort. You can understand Einstein, with time and effort.